Title :
Effect of microstructures on exchange anisotropy in Mn-Ir/Ni-Fe exchange-biased mutilayers with various stacking structures
Author :
Ro, Jae-Chul ; Choi, Young-Snk ; Suh, Su-Jung ; Lee, Hwack-Joo
Author_Institution :
Dept. of Metall. Eng., SungKyunKwan Univ., Suwon, South Korea
fDate :
9/1/1999 12:00:00 AM
Abstract :
The magnetic properties and the microstructures of the Mn-Ir/Ni-Fe multilayers with various stacking structures and buffer layer materials have been investigated. The (111) texture of Mn-Ir/Ni-Fe is obtained in the top structures with Ta or Zr buffer. However, all mutilayers which contain Mn-Ir films deposited on Ni-Fe films exhibit high Hex, regardless of the (111) preferred orientation of Mn-Ir film. The TS multilayers which show high Hex have large Mn-Ir grains at the interface, compared with BS multilayers without exchange anisotropy. The multilayers which reveal the exchange anisotropy also have the grain-to-grain epitaxial tendency at the interface of Mn-Ir/Ni-Fe. It is concluded that the Hex is not related to the (111) texture of the Mn-Ir film, but related to the grain size of the Mn-Ir film and the morphology at the interface between the Mn-Ir and the Ni-Fe grains
Keywords :
crystal microstructure; exchange interactions (electron); grain size; iridium alloys; iron alloys; magnetic anisotropy; magnetic epitaxial layers; magnetic multilayers; manganese alloys; metallic superlattices; nickel alloys; texture; (111) preferred orientation; (111) texture; Mn-Ir/Ni-Fe exchange-biased mutilayers; MnIr-NiFe; Ta buffer; Zr buffer; buffer layer materials; exchange anisotropy; grain size; grain-to-grain epitaxial tendency; large Mn-Ir grains; magnetic properties; microstructures; morphology; stacking structures; Anisotropic magnetoresistance; Buffer layers; Magnetic films; Magnetic materials; Magnetic multilayers; Magnetic properties; Microstructure; Nonhomogeneous media; Stacking; Zirconium;
Journal_Title :
Magnetics, IEEE Transactions on
